Cancel factors appearing on both sides:



Multiply both sides by 3:





 

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
 

The circumference of a circle  is:







 the area of the circle is:







if the circumference of a circle is  the area of the circle, we have



.......substitute  and 



...simplify























check:



=>=>



=>=>



=>



 

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